Dumping device.



Patented Jan. 14, 1919.

2 SHEETS-SHEET I.

IIIIE) k e l/VVLNTOR A TTORNEY DUMPING DEVICE.

APPLICATION FILED MAY s. 1918.

on E H C R N H m G "llllllllllllllllllllllll WIT/VESS 2 SHEETSSHEET 2.

Patented Jan. 14, 19.19.

N V N T 0 R 7 24 G. A. HINRICHER.

DUMPING DEVICE- APPLICATION men MAY 6,1918.

ATTORNEY GERHARD A. HINRICHER, OF KANSAS CITY, MISSOURI.

DUMPING DEVICE.

Specification of Letters Patent.

Patented Jan. 14, 1919.

Application filed May 6, 1918. Serial No. 232,965.

To l whom it may concern:

Be it known that I, GERHARD A. HIN- nIoHnR, a citizen of the United States, residin at Kansas City, in the county of Jackson, tate of Missouri, have invented certain new and useful Improvements in Dumping Devices, of which the following is a full specification.

The present invention relates to dumping apparatus, and aims to provide an improved and novel construction of dumping means for wagons, trucks and the like. In

carrying out this object I have devised a simple, strong and eflicient dumping mechanism adapted to be associated in compact relation with one end of the dumping body of the wagon, and also adapted to be operated either manually or by power derived from the motor of a truck Where the device is installed as a part of a motor dumping truck.

It is also an obj ect to provide an eflicient arrangement and construction for tipping the dumping body of the wagon or truck readily and quickly to the required dumping angle by a double-acting mechanism operating with both a thrusting and a pulling action to lift the load; and in this connection I have sought to devise an operating mechanism wherein the parts will not only maintain a compact and inconspicuous form when folded in inoperative position, but also have their operative movements so restricted as not to project noticeably out of the path of movement of the dumping body as the latter is elevated.

It is a further object of the invention to provide an apparatus of the character described in which the main operative elements of the lifting mechanism will operate with a self-adjusting movement for exerting a'thrust directly under the end of the load so as to provide a direct end lift while maintaining all the parts of the mechanism in properly counterbalanced relation.

It is also sought to devise a neat and durable construction comprising a comparatively small number of parts which will be cheap to manufacture and easy to install in working position. Minor ob]ects will appear in the course of the detailed description.

With these general objects in view the invention will now be described with reference to the accompanying drawings illustrating one practical form of embodiment of the proposed improvements, after which the features of novelty therein will be set forth and defined in the appended claims.

In the drawings Figure 1 is a side elevation of the rear portion of a truck provided with a dumping apparatus constructed in accordance with the present invention, and showing the dumping body in raised or tipped position;

Fig. 2 is a similar view showing a portion of the truck frame with the dumping mechanism in lowered position;

Fig. 3 is a front elevation of the dumping mechanism in the position illustrated in Fig. 1;

Fig. 4 is an enlarged vertical section taken on the line 4-4: of Fig. 2; and

Fig. 5 is an enlarged inverted plan view of the gear connections.

Referring now to the drawings in detail, the invention is illustrated therein in relation to a truck frame 6 of the motor truck type, though it will of course be understood that the improvements are adapted for dumping vehicles of practically any form. On the rame 6 is mounted a dumping body 8, the rear end portion of which is pivotally supported by apair of brackets 10 at the rear end of the truck frame.

The dumping device or means for tipping the dumping body about its pivotal mounting in the brackets 10, comprises the following mechanism. A shaft 12 is journaled in a bearing bracket 14 which is secured substantially centrally between the sides of the truck frame and spanning the space between a pair of the transverse members 16 of said frame, said shaft also extending out through a bracket 18 depending from one side of the frame 6, where a handle 20 is carried by said shaft for manual operation of the same. Swivelly mounted upon the shaft 12 and between the arms of the bracket 14 is a bearing yoke 22 in which is journaled the lower end of a lifting screw 24: having a bevel gear 26 fixed to its lower end and within said yoke. At diametrically opposite points the bevel gear 26 meshes with a pair of small bevel pinions 28 and 29 carried by the shaft 12, the pinion 28 being fixed to the shaft and the pinion 29 being mounted loosely thereon and facilitating the proper support and balancing of the gear 26. A third bevel pinion 30 is keyed to the shaft 12 adjacent the pinion 29 and serves to hold the latter against axial movement on the site trunnions 42 which are journaled in the sides of a forked bell crank lever 44 having rearwardly diverging arms which are pivoted at 46 to the bottom side rails 48 of the dumping body 8. The other arms of the bell crank lever 44 extend parallel and upwardly and terminate in a transverse connecting portion 50 which is provided with a recess 52 for accommodating the upper reduced and tapered end of the screw 24 when the parts are in collapsed relation as shown in Fig. 4.

The transverse connecting portion 50v is formed with ears 54 extending downward parallel with the adjacent arms of the bell crank lever 44 for the purpose of journaling a pair of cable sheaves 56 upon pins 58 within the brackets thus formed on the opposite sides of said lever. Over each of said sheaves 56 is trained a strong cable 60, and each cable has its forward end secured to a lug 62 projecting from the bracket 14, while the other ends of said cables are attached to the lower ends of a pair of arms 64 which are secured by bolts 66 to the front end of the dumping body 8. The lower or project ing portions of the arms 64 are bent slightly rearward and also diverge somewhat toward their lower ends so as to clear the gear 26 and adjacent parts when the device is 001- lapsed or in lowered position (Figs. 2 and 4). y

In the operation of the device it will be apparent that as the shaft 12 is turned either by operation of the handle 20 or by means of power transmitted from the shaft 34 through the gears 32 and 30, the gear 26 will be rotated, thereby turning the screw 24 and consequently shifting the nut 40 upward along said screw. This obviously operates at once to start swinging movement of the body 8 about its pivotal mountings in the brackets 10; but, the forward ends of the cables 60 being fixed, the continued rise of the bell crank lever 44 along with the body 8 cannot take place without simultaneous movement of the cables 60 over their sheaves '56, which shortens up the distance between said sheaves and the lower ends of thearms 64. This brings about a relative swinging movement between the dumping body 8 and the bell crank lever 44, with the result that the body 8 has imparted thereto a still further lifting action beyond what would be produced by the action of the screw alone, so that with the proportions of parts about as illustrated in the drawings, the front end of the dumping body is in effect elevated by this double lifting action (comprising a combined thrustdue to the action of the screw, and pull-due to the action of the cables) to a height above the truck frame approximately twice the length of the screw 24, and this brings the dumping body into an amply tilted position, as illustrated in Fig. 1, and insures effective dumping of the load. In the described operation, it will be observed that the movement of the parts of the lifting mechanism is such as to auto'- matically adjust the position of the screw so as to exert its thrust in a direction through the end of the dumping body and thus produce an efi'ective end lift, and all the parts cooperate with a counterbalanced action for accomplishing this result.

In the reverse operation, for restoring the parts to initial position as illustrated in Fig. 2, this is done by simply reversing the rotation of the shaft 12, either manually by the handle 20 or by power operation through the shaft 34, as may be preferred. In'this collapsed position of the device,the tip or upper end of the screw 24 fits in the recess 52 of the transverse connecting portion 50 of the bell crank lever, and thus holds the screw substantially fixed against any loose or rattling movement.

It will thus be apparent that a neat, simple and eflicient arrangement and construction have been provided for carrying out the desired objects of the invention. The device requires a minimum of space between the dumping body and the drivers seat, and does not involve the projection of any of the operating parts above the top of the dumping body since the double lifting action of the apparatus eliminates any high jacks or standards such as heretofore commonly employed for tipping the body to. an efficient dumping angle. It is apparent also that, if desired, the dumping body may be built of such form as to inclose the dumping mechanism on opposite sides so as to increase the capacity of the said dumping body and without interfering in any way with the operation of the dumping mechanism. 7

Various changes in form and construction are of course possible without involving any departure from the principle and scope of the invention, and while I have illustrated and described what has been found to constitute a practical and satisfactory formof embodiment of the improvements I desire to expressly reserve the right to make all such nected to said body and to said supporting formal changes or modifications as may fairly fall within the scope of the appended claims.

What I claim is:

1. A dumping apparatus comprising a supporting frame, a dumping body pivotally carried by said frame, and lifting mechanism comprising a screw and a nut operated thereby, a lever fulcrumed on said nut and havin one of its arms pivotally connected to said body, a flexible element connected to said body and to said supporting frame and having rolling engagement with the other arm of said lever, and means for rotating said screw to eflect cooperation of the same with said lever and flexible element to tip said dumping body.

2. A dumping apparatus comprising a supporting frame, a dumping body pivotally carried by said frame, and lifting mechanism comprising a screw and a nut operated thereby, a bell crank lever fulcrumed on said nut and having one of its arms pivotally connected to said body, a flexible element conframe and trained over the other arm of said lever, and means for rotatmg said screw to effect cooperation of the same wlth said lever and flexible element to exert a combined thrust and pulling action on said dumping body for tipping the latter.

3. A dumping apparatus comprising a supporting frame, a dumping body pivotally carried by said frame, and lifting mechanism comprising a screw pivotally supported by said frame, a nut operated by said screw, a lever fulcrumed on said nut and having one of its arms pivotally connected to said body, a flexible element connected to said body and to said supporting frame and trained over the other arm of said lever, means for rotating said screw to effect cooperation of the same with said lever and flexible element to tip said body, and means automatically engaging said screw, when said body is in lowered position, and acting to lock said screw against pivotal movement.

at. A dumping apparatus comprising a supporting frame, a dumping body pivotally carried by said frame, and lifting mechanism comprising a screw and nut operated thereby, a bell crank lever fulcrumed on said nut and having one of its arms pivotally connected to said body, a pair of cable sheaves carried by the other arm of said lever, a pair of cables connected to said body and to said supporting frame and having their intermediate portions trained around said sheaves, and means for rotating said screw to effect cooperation of the same with said lever and flexible element to exert a combined thrust and pulling action on said dumping body for tipping the latter.

5. A dumping apparatus comprising a supporting frame, a dumping body pivotally carried by said frame, a rigid arm projecting downward from the front portion of said body, and lifting mechanism comprising a screw and a nut operated thereby, a bell crank lever fulcrumed on said nut and having one of its arms pivotally connected to said body, and a flexible element connected to said supporting frame and to the lower end of said rigid arm, the intermediate portion of said flexible element being trained over the other arm of said lever, and

means for rotating said screw to effect 00- operation of the same with said lever and flexible element to exert a combined thrust and pulling action on said dumping body for tipping the latter.

6. A dumping apparatus comprising a supporting frame, a dumping body pivotally carried by said frame, and lifting mechanism comprising a screw pivotally supported by said frame, a bell crank lever having one of its arms pivotally connected to said dumping body, a nut pivoted to said lever and operable along said screw, a flexible element connected to said body and to said supporting frame and having rolling engagement with the other arm of said lever, means for rotating said screw to efiect co operation of the same with said lever and flexible element to exert a combined thrust and pulling action on said dumping body for tipping the latter, and means carried by said lever and adapted to engage said screw to hold the latter against pivotal movement when said body is in lowered position.

In testimony whereof I hereunto afiix my signature.

G. A. HINRICHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0." 

